591 lines
14 KiB
C
591 lines
14 KiB
C
|
/* Copyright (C) 2004-2006, Advanced Micro Devices, Inc.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/pci.h>
|
||
|
|
#include <linux/pci_ids.h>
|
||
|
|
#include <linux/crypto.h>
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
#include <crypto/algapi.h>
|
||
|
|
#include <crypto/aes.h>
|
||
|
|
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <linux/delay.h>
|
||
|
|
|
||
|
|
#include "geode-aes.h"
|
||
|
|
|
||
|
|
/* Static structures */
|
||
|
|
|
||
|
|
static void __iomem *_iobase;
|
||
|
|
static spinlock_t lock;
|
||
|
|
|
||
|
|
/* Write a 128 bit field (either a writable key or IV) */
|
||
|
|
static inline void
|
||
|
|
_writefield(u32 offset, void *value)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < 4; i++)
|
||
|
|
iowrite32(((u32 *) value)[i], _iobase + offset + (i * 4));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read a 128 bit field (either a writable key or IV) */
|
||
|
|
static inline void
|
||
|
|
_readfield(u32 offset, void *value)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < 4; i++)
|
||
|
|
((u32 *) value)[i] = ioread32(_iobase + offset + (i * 4));
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
do_crypt(void *src, void *dst, int len, u32 flags)
|
||
|
|
{
|
||
|
|
u32 status;
|
||
|
|
u32 counter = AES_OP_TIMEOUT;
|
||
|
|
|
||
|
|
iowrite32(virt_to_phys(src), _iobase + AES_SOURCEA_REG);
|
||
|
|
iowrite32(virt_to_phys(dst), _iobase + AES_DSTA_REG);
|
||
|
|
iowrite32(len, _iobase + AES_LENA_REG);
|
||
|
|
|
||
|
|
/* Start the operation */
|
||
|
|
iowrite32(AES_CTRL_START | flags, _iobase + AES_CTRLA_REG);
|
||
|
|
|
||
|
|
do {
|
||
|
|
status = ioread32(_iobase + AES_INTR_REG);
|
||
|
|
cpu_relax();
|
||
|
|
} while (!(status & AES_INTRA_PENDING) && --counter);
|
||
|
|
|
||
|
|
/* Clear the event */
|
||
|
|
iowrite32((status & 0xFF) | AES_INTRA_PENDING, _iobase + AES_INTR_REG);
|
||
|
|
return counter ? 0 : 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned int
|
||
|
|
geode_aes_crypt(struct geode_aes_op *op)
|
||
|
|
{
|
||
|
|
u32 flags = 0;
|
||
|
|
unsigned long iflags;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (op->len == 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
/* If the source and destination is the same, then
|
||
|
|
* we need to turn on the coherent flags, otherwise
|
||
|
|
* we don't need to worry
|
||
|
|
*/
|
||
|
|
|
||
|
|
flags |= (AES_CTRL_DCA | AES_CTRL_SCA);
|
||
|
|
|
||
|
|
if (op->dir == AES_DIR_ENCRYPT)
|
||
|
|
flags |= AES_CTRL_ENCRYPT;
|
||
|
|
|
||
|
|
/* Start the critical section */
|
||
|
|
|
||
|
|
spin_lock_irqsave(&lock, iflags);
|
||
|
|
|
||
|
|
if (op->mode == AES_MODE_CBC) {
|
||
|
|
flags |= AES_CTRL_CBC;
|
||
|
|
_writefield(AES_WRITEIV0_REG, op->iv);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(op->flags & AES_FLAGS_HIDDENKEY)) {
|
||
|
|
flags |= AES_CTRL_WRKEY;
|
||
|
|
_writefield(AES_WRITEKEY0_REG, op->key);
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = do_crypt(op->src, op->dst, op->len, flags);
|
||
|
|
BUG_ON(ret);
|
||
|
|
|
||
|
|
if (op->mode == AES_MODE_CBC)
|
||
|
|
_readfield(AES_WRITEIV0_REG, op->iv);
|
||
|
|
|
||
|
|
spin_unlock_irqrestore(&lock, iflags);
|
||
|
|
|
||
|
|
return op->len;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* CRYPTO-API Functions */
|
||
|
|
|
||
|
|
static int geode_setkey_cip(struct crypto_tfm *tfm, const u8 *key,
|
||
|
|
unsigned int len)
|
||
|
|
{
|
||
|
|
struct geode_aes_op *op = crypto_tfm_ctx(tfm);
|
||
|
|
unsigned int ret;
|
||
|
|
|
||
|
|
op->keylen = len;
|
||
|
|
|
||
|
|
if (len == AES_KEYSIZE_128) {
|
||
|
|
memcpy(op->key, key, len);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (len != AES_KEYSIZE_192 && len != AES_KEYSIZE_256) {
|
||
|
|
/* not supported at all */
|
||
|
|
tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The requested key size is not supported by HW, do a fallback
|
||
|
|
*/
|
||
|
|
op->fallback.cip->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
|
||
|
|
op->fallback.cip->base.crt_flags |= (tfm->crt_flags & CRYPTO_TFM_REQ_MASK);
|
||
|
|
|
||
|
|
ret = crypto_cipher_setkey(op->fallback.cip, key, len);
|
||
|
|
if (ret) {
|
||
|
|
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
|
||
|
|
tfm->crt_flags |= (op->fallback.cip->base.crt_flags & CRYPTO_TFM_RES_MASK);
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int geode_setkey_blk(struct crypto_tfm *tfm, const u8 *key,
|
||
|
|
unsigned int len)
|
||
|
|
{
|
||
|
|
struct geode_aes_op *op = crypto_tfm_ctx(tfm);
|
||
|
|
unsigned int ret;
|
||
|
|
|
||
|
|
op->keylen = len;
|
||
|
|
|
||
|
|
if (len == AES_KEYSIZE_128) {
|
||
|
|
memcpy(op->key, key, len);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (len != AES_KEYSIZE_192 && len != AES_KEYSIZE_256) {
|
||
|
|
/* not supported at all */
|
||
|
|
tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The requested key size is not supported by HW, do a fallback
|
||
|
|
*/
|
||
|
|
op->fallback.blk->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
|
||
|
|
op->fallback.blk->base.crt_flags |= (tfm->crt_flags & CRYPTO_TFM_REQ_MASK);
|
||
|
|
|
||
|
|
ret = crypto_blkcipher_setkey(op->fallback.blk, key, len);
|
||
|
|
if (ret) {
|
||
|
|
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
|
||
|
|
tfm->crt_flags |= (op->fallback.blk->base.crt_flags & CRYPTO_TFM_RES_MASK);
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fallback_blk_dec(struct blkcipher_desc *desc,
|
||
|
|
struct scatterlist *dst, struct scatterlist *src,
|
||
|
|
unsigned int nbytes)
|
||
|
|
{
|
||
|
|
unsigned int ret;
|
||
|
|
struct crypto_blkcipher *tfm;
|
||
|
|
struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
|
||
|
|
|
||
|
|
tfm = desc->tfm;
|
||
|
|
desc->tfm = op->fallback.blk;
|
||
|
|
|
||
|
|
ret = crypto_blkcipher_decrypt_iv(desc, dst, src, nbytes);
|
||
|
|
|
||
|
|
desc->tfm = tfm;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
static int fallback_blk_enc(struct blkcipher_desc *desc,
|
||
|
|
struct scatterlist *dst, struct scatterlist *src,
|
||
|
|
unsigned int nbytes)
|
||
|
|
{
|
||
|
|
unsigned int ret;
|
||
|
|
struct crypto_blkcipher *tfm;
|
||
|
|
struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
|
||
|
|
|
||
|
|
tfm = desc->tfm;
|
||
|
|
desc->tfm = op->fallback.blk;
|
||
|
|
|
||
|
|
ret = crypto_blkcipher_encrypt_iv(desc, dst, src, nbytes);
|
||
|
|
|
||
|
|
desc->tfm = tfm;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
geode_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
|
||
|
|
{
|
||
|
|
struct geode_aes_op *op = crypto_tfm_ctx(tfm);
|
||
|
|
|
||
|
|
if (unlikely(op->keylen != AES_KEYSIZE_128)) {
|
||
|
|
crypto_cipher_encrypt_one(op->fallback.cip, out, in);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
op->src = (void *) in;
|
||
|
|
op->dst = (void *) out;
|
||
|
|
op->mode = AES_MODE_ECB;
|
||
|
|
op->flags = 0;
|
||
|
|
op->len = AES_BLOCK_SIZE;
|
||
|
|
op->dir = AES_DIR_ENCRYPT;
|
||
|
|
|
||
|
|
geode_aes_crypt(op);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static void
|
||
|
|
geode_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
|
||
|
|
{
|
||
|
|
struct geode_aes_op *op = crypto_tfm_ctx(tfm);
|
||
|
|
|
||
|
|
if (unlikely(op->keylen != AES_KEYSIZE_128)) {
|
||
|
|
crypto_cipher_decrypt_one(op->fallback.cip, out, in);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
op->src = (void *) in;
|
||
|
|
op->dst = (void *) out;
|
||
|
|
op->mode = AES_MODE_ECB;
|
||
|
|
op->flags = 0;
|
||
|
|
op->len = AES_BLOCK_SIZE;
|
||
|
|
op->dir = AES_DIR_DECRYPT;
|
||
|
|
|
||
|
|
geode_aes_crypt(op);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fallback_init_cip(struct crypto_tfm *tfm)
|
||
|
|
{
|
||
|
|
const char *name = crypto_tfm_alg_name(tfm);
|
||
|
|
struct geode_aes_op *op = crypto_tfm_ctx(tfm);
|
||
|
|
|
||
|
|
op->fallback.cip = crypto_alloc_cipher(name, 0,
|
||
|
|
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
|
||
|
|
|
||
|
|
if (IS_ERR(op->fallback.cip)) {
|
||
|
|
printk(KERN_ERR "Error allocating fallback algo %s\n", name);
|
||
|
|
return PTR_ERR(op->fallback.cip);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void fallback_exit_cip(struct crypto_tfm *tfm)
|
||
|
|
{
|
||
|
|
struct geode_aes_op *op = crypto_tfm_ctx(tfm);
|
||
|
|
|
||
|
|
crypto_free_cipher(op->fallback.cip);
|
||
|
|
op->fallback.cip = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct crypto_alg geode_alg = {
|
||
|
|
.cra_name = "aes",
|
||
|
|
.cra_driver_name = "geode-aes",
|
||
|
|
.cra_priority = 300,
|
||
|
|
.cra_alignmask = 15,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_CIPHER |
|
||
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
||
|
|
.cra_init = fallback_init_cip,
|
||
|
|
.cra_exit = fallback_exit_cip,
|
||
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct geode_aes_op),
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_u = {
|
||
|
|
.cipher = {
|
||
|
|
.cia_min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.cia_max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
.cia_setkey = geode_setkey_cip,
|
||
|
|
.cia_encrypt = geode_encrypt,
|
||
|
|
.cia_decrypt = geode_decrypt
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
static int
|
||
|
|
geode_cbc_decrypt(struct blkcipher_desc *desc,
|
||
|
|
struct scatterlist *dst, struct scatterlist *src,
|
||
|
|
unsigned int nbytes)
|
||
|
|
{
|
||
|
|
struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
|
||
|
|
struct blkcipher_walk walk;
|
||
|
|
int err, ret;
|
||
|
|
|
||
|
|
if (unlikely(op->keylen != AES_KEYSIZE_128))
|
||
|
|
return fallback_blk_dec(desc, dst, src, nbytes);
|
||
|
|
|
||
|
|
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||
|
|
err = blkcipher_walk_virt(desc, &walk);
|
||
|
|
op->iv = walk.iv;
|
||
|
|
|
||
|
|
while ((nbytes = walk.nbytes)) {
|
||
|
|
op->src = walk.src.virt.addr,
|
||
|
|
op->dst = walk.dst.virt.addr;
|
||
|
|
op->mode = AES_MODE_CBC;
|
||
|
|
op->len = nbytes - (nbytes % AES_BLOCK_SIZE);
|
||
|
|
op->dir = AES_DIR_DECRYPT;
|
||
|
|
|
||
|
|
ret = geode_aes_crypt(op);
|
||
|
|
|
||
|
|
nbytes -= ret;
|
||
|
|
err = blkcipher_walk_done(desc, &walk, nbytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
geode_cbc_encrypt(struct blkcipher_desc *desc,
|
||
|
|
struct scatterlist *dst, struct scatterlist *src,
|
||
|
|
unsigned int nbytes)
|
||
|
|
{
|
||
|
|
struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
|
||
|
|
struct blkcipher_walk walk;
|
||
|
|
int err, ret;
|
||
|
|
|
||
|
|
if (unlikely(op->keylen != AES_KEYSIZE_128))
|
||
|
|
return fallback_blk_enc(desc, dst, src, nbytes);
|
||
|
|
|
||
|
|
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||
|
|
err = blkcipher_walk_virt(desc, &walk);
|
||
|
|
op->iv = walk.iv;
|
||
|
|
|
||
|
|
while ((nbytes = walk.nbytes)) {
|
||
|
|
op->src = walk.src.virt.addr,
|
||
|
|
op->dst = walk.dst.virt.addr;
|
||
|
|
op->mode = AES_MODE_CBC;
|
||
|
|
op->len = nbytes - (nbytes % AES_BLOCK_SIZE);
|
||
|
|
op->dir = AES_DIR_ENCRYPT;
|
||
|
|
|
||
|
|
ret = geode_aes_crypt(op);
|
||
|
|
nbytes -= ret;
|
||
|
|
err = blkcipher_walk_done(desc, &walk, nbytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fallback_init_blk(struct crypto_tfm *tfm)
|
||
|
|
{
|
||
|
|
const char *name = crypto_tfm_alg_name(tfm);
|
||
|
|
struct geode_aes_op *op = crypto_tfm_ctx(tfm);
|
||
|
|
|
||
|
|
op->fallback.blk = crypto_alloc_blkcipher(name, 0,
|
||
|
|
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
|
||
|
|
|
||
|
|
if (IS_ERR(op->fallback.blk)) {
|
||
|
|
printk(KERN_ERR "Error allocating fallback algo %s\n", name);
|
||
|
|
return PTR_ERR(op->fallback.blk);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void fallback_exit_blk(struct crypto_tfm *tfm)
|
||
|
|
{
|
||
|
|
struct geode_aes_op *op = crypto_tfm_ctx(tfm);
|
||
|
|
|
||
|
|
crypto_free_blkcipher(op->fallback.blk);
|
||
|
|
op->fallback.blk = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct crypto_alg geode_cbc_alg = {
|
||
|
|
.cra_name = "cbc(aes)",
|
||
|
|
.cra_driver_name = "cbc-aes-geode",
|
||
|
|
.cra_priority = 400,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
|
||
|
|
CRYPTO_ALG_KERN_DRIVER_ONLY |
|
||
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
||
|
|
.cra_init = fallback_init_blk,
|
||
|
|
.cra_exit = fallback_exit_blk,
|
||
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct geode_aes_op),
|
||
|
|
.cra_alignmask = 15,
|
||
|
|
.cra_type = &crypto_blkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_u = {
|
||
|
|
.blkcipher = {
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
.setkey = geode_setkey_blk,
|
||
|
|
.encrypt = geode_cbc_encrypt,
|
||
|
|
.decrypt = geode_cbc_decrypt,
|
||
|
|
.ivsize = AES_BLOCK_SIZE,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
static int
|
||
|
|
geode_ecb_decrypt(struct blkcipher_desc *desc,
|
||
|
|
struct scatterlist *dst, struct scatterlist *src,
|
||
|
|
unsigned int nbytes)
|
||
|
|
{
|
||
|
|
struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
|
||
|
|
struct blkcipher_walk walk;
|
||
|
|
int err, ret;
|
||
|
|
|
||
|
|
if (unlikely(op->keylen != AES_KEYSIZE_128))
|
||
|
|
return fallback_blk_dec(desc, dst, src, nbytes);
|
||
|
|
|
||
|
|
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||
|
|
err = blkcipher_walk_virt(desc, &walk);
|
||
|
|
|
||
|
|
while ((nbytes = walk.nbytes)) {
|
||
|
|
op->src = walk.src.virt.addr,
|
||
|
|
op->dst = walk.dst.virt.addr;
|
||
|
|
op->mode = AES_MODE_ECB;
|
||
|
|
op->len = nbytes - (nbytes % AES_BLOCK_SIZE);
|
||
|
|
op->dir = AES_DIR_DECRYPT;
|
||
|
|
|
||
|
|
ret = geode_aes_crypt(op);
|
||
|
|
nbytes -= ret;
|
||
|
|
err = blkcipher_walk_done(desc, &walk, nbytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
geode_ecb_encrypt(struct blkcipher_desc *desc,
|
||
|
|
struct scatterlist *dst, struct scatterlist *src,
|
||
|
|
unsigned int nbytes)
|
||
|
|
{
|
||
|
|
struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
|
||
|
|
struct blkcipher_walk walk;
|
||
|
|
int err, ret;
|
||
|
|
|
||
|
|
if (unlikely(op->keylen != AES_KEYSIZE_128))
|
||
|
|
return fallback_blk_enc(desc, dst, src, nbytes);
|
||
|
|
|
||
|
|
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||
|
|
err = blkcipher_walk_virt(desc, &walk);
|
||
|
|
|
||
|
|
while ((nbytes = walk.nbytes)) {
|
||
|
|
op->src = walk.src.virt.addr,
|
||
|
|
op->dst = walk.dst.virt.addr;
|
||
|
|
op->mode = AES_MODE_ECB;
|
||
|
|
op->len = nbytes - (nbytes % AES_BLOCK_SIZE);
|
||
|
|
op->dir = AES_DIR_ENCRYPT;
|
||
|
|
|
||
|
|
ret = geode_aes_crypt(op);
|
||
|
|
nbytes -= ret;
|
||
|
|
ret = blkcipher_walk_done(desc, &walk, nbytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct crypto_alg geode_ecb_alg = {
|
||
|
|
.cra_name = "ecb(aes)",
|
||
|
|
.cra_driver_name = "ecb-aes-geode",
|
||
|
|
.cra_priority = 400,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
|
||
|
|
CRYPTO_ALG_KERN_DRIVER_ONLY |
|
||
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
||
|
|
.cra_init = fallback_init_blk,
|
||
|
|
.cra_exit = fallback_exit_blk,
|
||
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct geode_aes_op),
|
||
|
|
.cra_alignmask = 15,
|
||
|
|
.cra_type = &crypto_blkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_u = {
|
||
|
|
.blkcipher = {
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
.setkey = geode_setkey_blk,
|
||
|
|
.encrypt = geode_ecb_encrypt,
|
||
|
|
.decrypt = geode_ecb_decrypt,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
static void geode_aes_remove(struct pci_dev *dev)
|
||
|
|
{
|
||
|
|
crypto_unregister_alg(&geode_alg);
|
||
|
|
crypto_unregister_alg(&geode_ecb_alg);
|
||
|
|
crypto_unregister_alg(&geode_cbc_alg);
|
||
|
|
|
||
|
|
pci_iounmap(dev, _iobase);
|
||
|
|
_iobase = NULL;
|
||
|
|
|
||
|
|
pci_release_regions(dev);
|
||
|
|
pci_disable_device(dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int geode_aes_probe(struct pci_dev *dev, const struct pci_device_id *id)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
ret = pci_enable_device(dev);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ret = pci_request_regions(dev, "geode-aes");
|
||
|
|
if (ret)
|
||
|
|
goto eenable;
|
||
|
|
|
||
|
|
_iobase = pci_iomap(dev, 0, 0);
|
||
|
|
|
||
|
|
if (_iobase == NULL) {
|
||
|
|
ret = -ENOMEM;
|
||
|
|
goto erequest;
|
||
|
|
}
|
||
|
|
|
||
|
|
spin_lock_init(&lock);
|
||
|
|
|
||
|
|
/* Clear any pending activity */
|
||
|
|
iowrite32(AES_INTR_PENDING | AES_INTR_MASK, _iobase + AES_INTR_REG);
|
||
|
|
|
||
|
|
ret = crypto_register_alg(&geode_alg);
|
||
|
|
if (ret)
|
||
|
|
goto eiomap;
|
||
|
|
|
||
|
|
ret = crypto_register_alg(&geode_ecb_alg);
|
||
|
|
if (ret)
|
||
|
|
goto ealg;
|
||
|
|
|
||
|
|
ret = crypto_register_alg(&geode_cbc_alg);
|
||
|
|
if (ret)
|
||
|
|
goto eecb;
|
||
|
|
|
||
|
|
dev_notice(&dev->dev, "GEODE AES engine enabled.\n");
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
eecb:
|
||
|
|
crypto_unregister_alg(&geode_ecb_alg);
|
||
|
|
|
||
|
|
ealg:
|
||
|
|
crypto_unregister_alg(&geode_alg);
|
||
|
|
|
||
|
|
eiomap:
|
||
|
|
pci_iounmap(dev, _iobase);
|
||
|
|
|
||
|
|
erequest:
|
||
|
|
pci_release_regions(dev);
|
||
|
|
|
||
|
|
eenable:
|
||
|
|
pci_disable_device(dev);
|
||
|
|
|
||
|
|
dev_err(&dev->dev, "GEODE AES initialization failed.\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct pci_device_id geode_aes_tbl[] = {
|
||
|
|
{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_LX_AES), } ,
|
||
|
|
{ 0, }
|
||
|
|
};
|
||
|
|
|
||
|
|
MODULE_DEVICE_TABLE(pci, geode_aes_tbl);
|
||
|
|
|
||
|
|
static struct pci_driver geode_aes_driver = {
|
||
|
|
.name = "Geode LX AES",
|
||
|
|
.id_table = geode_aes_tbl,
|
||
|
|
.probe = geode_aes_probe,
|
||
|
|
.remove = geode_aes_remove,
|
||
|
|
};
|
||
|
|
|
||
|
|
module_pci_driver(geode_aes_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Advanced Micro Devices, Inc.");
|
||
|
|
MODULE_DESCRIPTION("Geode LX Hardware AES driver");
|
||
|
|
MODULE_LICENSE("GPL");
|